91Ó°ÊÓ

Real numbers are simply the combination of Whole numbers, Integers, Rational and Irrational numbers in the number system.

Multiplication Properties of Real numbers:

Suppose a, b, and c is three real numbers.

Closure Property of Multiplication

Property: $\text{a}  ·  b$ is a real number.

If we multiply two real numbers, then their product is also a real number.

Example: $\text{8}  ·  9  =72$, where 72 (the product of 8 and 9) is a real number.

Given in the question:

You work 4 hours each day as a cashier and earn $8 each hour.

Earning of 1 hour = $8$

Earning of 4 hour = $4  ·   8  =  32$

Now find how much money you earn during a 5 day work week.

Earning of one day = earnings of 4 hours = $32$

So, earning of 5 days =localid="1650329195411" $5  ·  32  =  \$160$.